Controllable coolant pump for combustion engine of motor vehicle, has operating chamber of pressure intensifier, which is arranged at pump housing, and annular piston operating sleeve is provided, which is inserted in sleeve retainer

摘要

The controllable coolant pump has an operating chamber (12) of a pressure intensifier (13), which is arranged at a pump housing (1). A sleeve retainer (17) is arranged in the pump housing adjacent to a ring channel (16). An annular piston operating sleeve (18) is inserted in the sleeve retainer. The flow-through openings are arranged at a base (19) for the ring channel. A bypass sealing (25) is arranged at a slide valve (9) in the transition area from a rear wall (7) to an outside cylinder (8). An operating medium (27) such as glycol is an anti-freezing agent used with coolants.